Question

在此处输入代码我遇到以下问题。

我在一个面板中添加了两个JPanels，最后将其添加到我的TabbedPane中。但是，我想让它可滚动，因此我只是使Panel可滚动，只是在栏的中间添加我的滚动条。

以下是我的例子：

public class Test extends JFrame {

    private static final long serialVersionUID = -4682396888922360841L;    
    private JMenuBar menuBar;    
    private JMenu mAbout;    
    private JMenu mMain;    
    private JTabbedPane tabbedPane;    
    public SettingsTab settings = new SettingsTab();

    private void addMenuBar() {    
        menuBar = new JMenuBar();    
        mMain = new JMenu("Main");
        mAbout = new JMenu("About");    
        menuBar.add(mMain);
        menuBar.add(mAbout);    
        setJMenuBar(menuBar);    
    }

    public void createTabBar() {    
        tabbedPane = new JTabbedPane(JTabbedPane.TOP);    
        JComponent panel2 = new JPanel();
        tabbedPane.addTab("Test1", null, panel2,
                "Displays the results");    
        tabbedPane.addTab("Settings", settings.createLayout());    
        add(tabbedPane);    
        tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);    
    }

    private void makeLayout() {    
        setTitle("Test");
        setLayout(new BorderLayout());
        setPreferredSize(new Dimension(1000, 500));    
        addMenuBar();
        createTabBar();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);    
    }    

    public void start() {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                makeLayout();   
            }
        });
    }

    public static void main(String[] args) {    
        Test gui = new Test();
        gui.start();    
    }

    public class SettingsTab extends JPanel {        
        public JPanel createLayout() {
            JPanel panel = new JPanel();    
            panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));    
            panel.add(table1());
            panel.add(Box.createRigidArea(new Dimension(0,10)));
            panel.add(table2());
            panel.add(Box.createRigidArea(new Dimension(0,10)));                
            panel.add(new JScrollBar());    
            return panel;
        }

        public JPanel table1() {
            JPanel panel1 = new JPanel();    
            String[] columnNames = {"First Name", "Last Name"};    
            Object[][] data = {{"Kathy", "Smith"}, {"John", "Doe"},
                    {"Sue", "Black"}, {"Jane", "White"}, {"Joe", "Brown"}
            };    
            final JTable table = new JTable(data, columnNames);    
            panel1.add(table);    
            panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));    
            return panel1;
        }

        public JPanel table2() {
            JPanel panel1 = new JPanel();    
            String[] columnNames = {"First Name", "Last Name"};    
            Object[][] data = { {"Kathy", "Smith"}, {"John", "Doe"},
                    {"Sue", "Black"}, {"Jane", "White"}, {"Joe", "Brown"}
            };    
            final JTable table = new JTable(data, columnNames);
            table.setPreferredScrollableViewportSize(new Dimension(500, 70));
            table.setFillsViewportHeight(true);    
            panel1.add(table);    
            panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));    
            return panel1;
        }
    }
}

任何建议我做错了什么？

感谢您的回复！

更新

我用JScrollPane尝试了它，但它仍然不起作用：

public class Test extends JFrame {

    private static final long serialVersionUID = -4682396888922360841L;

    private JMenuBar menuBar;

    private JMenu mAbout;

    private JMenu mMain;

    private JTabbedPane tabbedPane;

    public SettingsTab settings = new SettingsTab();

    private void addMenuBar() {

        menuBar = new JMenuBar();

        mMain = new JMenu("Main");
        mAbout = new JMenu("About");

        menuBar.add(mMain);
        menuBar.add(mAbout);

        setJMenuBar(menuBar);

    }

    public void createTabBar() {

        tabbedPane = new JTabbedPane(JTabbedPane.TOP);

        JComponent panel2 = new JPanel();
        tabbedPane.addTab("Test1", null, panel2,
                "Displays the results");

        tabbedPane.addTab("Settings", settings.createLayout());

        add(tabbedPane);

        tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);

    }

    private void makeLayout() {

        setTitle("Test");
        setLayout(new BorderLayout());
        setPreferredSize(new Dimension(1000, 500));

        addMenuBar();
        createTabBar();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);

    }


    public void start() {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                makeLayout();   
            }
        });
    }

    public static void main(String[] args) {

        Test gui = new Test();
        gui.start();

    }

    public class SettingsTab extends JScrollPane {


        public JPanel createLayout() {
            JPanel panel = new JPanel();

            panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

            panel.add(table1());
            panel.add(Box.createRigidArea(new Dimension(0,10)));
            panel.add(table2());
            panel.add(Box.createRigidArea(new Dimension(0,10)));
            panel.add(table3());
            panel.add(Box.createRigidArea(new Dimension(0,10)));

            add(new JScrollPane());

            return panel;
        }

        public JPanel table1() {
            JPanel panel1 = new JPanel();

            String[] columnNames = {"First Name",
            "Last Name"};

            Object[][] data = {
                    {"Kathy", "Smith"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"}
            };

            final JTable table = new JTable(data, columnNames);

            panel1.add(table);

            panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));

            return panel1;
        }

        public JPanel table2() {
            JPanel panel1 = new JPanel();

            String[] columnNames = {"First Name",
            "Last Name"};

            Object[][] data = {
                    {"Kathy", "Smith"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"}
            };

            final JTable table = new JTable(data, columnNames);
            table.setPreferredScrollableViewportSize(new Dimension(500, 70));
            table.setFillsViewportHeight(true);

            panel1.add(table);

            panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));

            return panel1;
        }

        public JPanel table3() {
            JPanel panel1 = new JPanel();

            String[] columnNames = {"First Name",
            "Last Name"};

            Object[][] data = {
                    {"Kathy", "Smith"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"},
                    {"John", "Doe"},
                    {"Sue", "Black"},
                    {"Jane", "White"},
                    {"Joe", "Brown"}
            };

            final JTable table = new JTable(data, columnNames);
            table.setPreferredScrollableViewportSize(new Dimension(500, 70));
            table.setFillsViewportHeight(true);

            panel1.add(table);

            panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));

            return panel1;
        }
    }
}

Answer 1

您必须在其上添加JScrollPane！：）

我真的不知道你在那里做了什么，但基本上就是这样：

JPanel myPanel = new JPanel(); // the main content is on the myPanel
myPanel.add(myContent);// add everything you want

new JFrame().add(new JScrollPane(myPanel));

Answer 2

在JTable内添加JScrollPane，然后在JScrollPane中添加JPanel。

JScrollPane pane = new JScrollPane(table);
panel1.add(pane);

不需要下面的行：

panel.add(new JScrollBar());

请参阅How to Use Tables上的 Swing Tutorial ，您也可以在这里找到示例。

如果需要，您可以设置JPanel的大小（并非总是需要），然后将其添加到JScrollPane

中

JPanel panel = new JPanel(){
    @Override
    public Dimension getSize(){
        return new Dimension(...,....);
    }
};

修改

您未在JScrollPane内添加。它应该是

tabbedPane.addTab("Settings", new JScrollPane(settings.createLayout()));

并删除以下行：

add(new JScrollPane());

enter image description here

Answer 3

你的答案很多！但是，这只会使JTable可滚动。是否也可以在表格所在的位置滚动JPanel？

如果这是你需要的

enter image description here

那么你可以这样做：

public JScrollPane createLayout() {

    JPanel panel = new JPanel();
    JScrollPane sp = new JScrollPane(panel);
    sp.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
                    // or ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED

    panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

    panel.add(table1());
    panel.add(Box.createRigidArea(new Dimension(0,10)));
    panel.add(table2());
    panel.add(Box.createRigidArea(new Dimension(0,10)));


    return sp;
}

JTabBar中的JPanel不可滚动

3 个答案:

修改